Coating for protecting bronze surfaces.



OSCAR HOMMEL, OF PITTSBURGH, PENNSYLVANIA.

i COATING FOR PROTECTING-BRONZE SURFACES.

' 1 ,1s ,ss9. No Drawing.

7b all whom it may concern:

Be it known that I, OSCAR HoMMEIi, a

citizen of the United States, and a resident of Pittsburgh, county of Allegheny, and

State of Pennsylvania, have invented a new and useful Improvements in Coating for ProtectingBronzed Surfaces, of wh ch the following is a specification, the principle of the invention being herein explained and the 10 best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates to a new method and "an improved composition for protecting surfaces covered or treated with bronze powders or metal leaf; In this connection bronze powder is a general term used in the trade for referring to all classes of powder or ground metal, such as cop er, brass, bronze, aluminum, tin, etc., or allfgs of these metals, and is not limited to br nze alloy alone, as would ordinarily be indicated by the term. In the following description of my inven tion I use the words bronze powder and the word bronzed as indicating this general treatment for surfaces.

My invention deals with a composition and a m thod of applying the same which may be ilsed as a coating for thebronzed surface, and one which protects the coating from the action of the atmosphere, without in any way acting upon the alloy itself, or the vehicle in which the alloy is usually applied to the surfaces to be coated.

To theaceomplishment of the foregoing and related. ends, said invention, then, consists of them'e'ans'and ingredients hereina fter fully described and particularly point-I ed out in theclaims.

The followinjgdescription sets forth in detail certain f ngredients constituting the composition embodying the invention, and

the means for applying the same, such combined ingredients and disclosed means constituting, however, but one of various forms in-which the principle of the invention may be used.

Bronze powders as now generally used, do not 've a permanent surface as the owder is a ected by the atmosphere and 15 thus tarnished and made to lose its brilliancy;

In order to protect a bronzed surface, it is generally coated with some sort of varnish or lacquer which excludesthe air from the bronze powder and thus prevents tarnishing Specification of Letters Patent.

Patented May 2, 1916 Application filed November 2, 1914. Serial No. 869,787.

of the same under atmospheric action. This method of protecting the bronzed surfaces is, however, not satisfactory, as the solvents contained in the varnish or other coating will uniformly re-act' with the vehicle in which the bronze powder is applied, to change the appearance and brilliancy of the bronzed surfaces.

My new composition is adapted to protect a bronze surface by application as a coating thereover, thus preventing atmospheric action on the surfaces, but my composition contains no ingredients which will in any way re-act with either the bronze powder or the vehicle in which it is applied, to the detriment of the surfaces. Furthermore, my improved method is much simpler than the former process of coating. My composition comprises a wax or resin, or a mixture of one or more of each, which is then treated with a suitable solvent, preferably turpentine, although either benzin or benzol may be used if desired, in sufficient quantity to form a: relatively thick paste, when such paste may be applied by rubbing the paste over the bronzed surface with a cloth. For certain purposes, the

paste may be made thinner and may be ap plied with a brush. A very satisfactory coating may be secured by sprinkling the wax, or mixture of waxes, in powdered form over the bronzed surfaces. This is followed by a rubbing down of the powder until a protective coating is produced over the entire surface.

'The preferred composition comprises bees-wax, carnauba Wax and turpentine in the proportions of five, one and a quarter and seven by weight. These compositions may-be varied and to the wax may be adde one or more resins for certain purposes, if desired. In certain instances, such for example as upon bronze surfaces used on piano plates, it may be desirable to use a com osit on consistin of bees-wax, carnau a wax and olive oil. 1

dos

the one explained, change being made as regards the process herein disclosed or the materials employed in carrying out the proc ess, provided the step or'steps stated by any of the following claims or the equivalent of such stated step or steps be employed.

I therefore particularly point out and distinctly claim as my invention 1. The combination with an article having a bronzed surface of a coating thereon comprising bees-wax and carnauba wax par- 1) tially dissolved in about an equal amount of turpentine.

2. The combination with an article having a bronzed surface of a pasty coating thereon comprising five parts of bees-Wax and one 20 and one-quarter parts of carnauba wax dissolved in seven parts of turpentine.

Signed by me, this 29. day of October, 1914.

OSCAR HOMMEL. 

